VisualRuler 2.0

You already have the ruler. You just did not know it was in your wallet.

Ruler App turns any standard card into a precision tape measure. Place your bank card, transit card or library card next to anything you want to measure, take a photo and get real dimensions in millimeters, centimeters or inches. No LiDAR. No depth sensor. No AR tricks. Just your iPhone and a card you already carry every day.

HOW IT WORKS

1. Place any standard card next to what you want to measure.
2. Open the app and point your camera. Card detection is instant and automatic.
3. Fine-tune the card corners with a drag for perfect precision.
4. Tap to place a line or rectangle. Read dimensions immediately.

That is it. Four steps to a real measurement, anywhere you are.

THE MEASURING TOOL EVERYONE NEEDS

Measure furniture before you buy it. Check whether a shelf, frame, rug or appliance will actually fit. Get accurate package dimensions for shipping labels. Measure clothing sizes from a photo so online orders fit the first time. Capture DIY project sizes at home, in a store or on site.

Professionals rely on it too. Architects verify site dimensions before ordering materials. Interior designers confirm furniture fit before committing. Stylists measure garment details from lookbook photos. Ecommerce sellers get accurate parcel dimensions fast. Product developers capture prototype measurements in the field.

WORKS ON EVERY IPHONE

No LiDAR sensor required. No depth camera. No special hardware at all. If your iPhone has a camera, this ruler app works. That includes every iPhone and iPad ever made.

WHAT YOU CAN MEASURE

Furniture, clothing, electronics, artwork, parcels, hardware parts, plant pots, books, screens and anything flat. Draw a line measurement for a single dimension or a rectangle to capture width and height at once. Switch between mm, cm and inches at any time.

WHY EVERYONE SHOULD HAVE THIS APP

• Replaces a tape measure when you cannot find one
• Works on every iPhone and iPad without LiDAR or any depth sensor
• Instant automatic card detection gets you measuring in seconds
• Draggable card corners give you precise control
• Millimeters, centimeters and inches with instant switching
• Measure from photos already in your photo library
• Fully offline and completely private

ACCURACY

Typically 1 to 3 mm for flat objects photographed straight on. Powered by the same projective geometry used in professional photogrammetry software.

PRIVACY

Zero data collection. No analytics, no crash reporting, no account, no subscription. Every photo is processed entirely on your device and never leaves it.

VisualRuler 4 is a complete rebuild from the ground up.

• Redesigned from scratch for a cleaner, faster and more intuitive measuring workflow
• Smarter card detection with real time confidence feedback
• Instant auto lock freezes the frame automatically when the card is found
• Refined corner dragging lets you recalibrate at any time without losing measurements
• Support for both metric and imperial units
• Photo library import lets you measure from existing photos, not just live camera
• Built for iOS 18 and optimized for the latest iPhones and iPads